Estimating the Radioactive Heat Production of a Granitic Rock in the University of A Coruña (Galicia, Northwest Spain) by Gamma-ray Spectrometry
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Estimating the Radioactive Heat Production of a Granitic Rock in the University of A Coruña (Galicia, Northwest Spain) by Gamma-ray SpectrometryDate
2022-11-23Citation
Sanjurjo-Sánchez, J.; Barrientos Rodríguez, V.; Arce Chamorro, C.; Alves, C. Estimating the Radioactive Heat Production of a Granitic Rock in the University of A Coruña (Galicia, Northwest Spain) by Gamma-ray Spectrometry. Appl. Sci. 2022, 12, 11965. https://doi.org/10.3390/app122311965
Abstract
[Abstract] Geothermal energy is a form of renewable energy with a long tradition in European countries, although it is scarcely used in Spain. One of the reasons for this is the poorly studied geothermal potential of the Spanish territory. In recent years, data published on terrestrial gamma radiation and the geochemistry of radioisotopes in rocks have suggested that the radiogenic heat production (RHP) in some areas of Spain is high. In this work, we assessed the RHP by analysing the U, Th, and K contents of the rocks underlying the most important campus of the University of A Coruña (northwest Spain), using in situ handheld gamma-ray spectrometry (GRS) and X-ray fluorescence spectrometry (XRF). Our results provide a good fit of the radioisotope contents and unexpectedly high RHP, compared with average data observed in similar rocks (granodiorite). These results reveal that GRS is a very reliable tool for studying the RHP of rock surfaces, and that geothermal energy can be used in the area (i.e., the studied campus, but also most of the city of A Coruña, as it is built on the same underlying rock) for central heating in buildings using ground-source heat pumps (GSHPs).
Keywords
Geothermal energy
Radiogenic heat production
Radioisotope content
Gamma-ray spectrometry
Granitoid
Radiogenic heat production
Radioisotope content
Gamma-ray spectrometry
Granitoid
Description
This article belongs to the Topic Geothermal Energy Technology and Current Status
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Atribución 4.0 Internacional
ISSN
2076-3417